Full-stack developer · Argentina

Martín Leonardi

Building software that works, AI-focused.

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About

Full-stack developer based in Argentina. Finishing my Computer Science degree this December; I already hold an Associate's in Programming from UTN. I build with AI every day — Claude Code, agents, automations — and I'd rather be inside what's happening than wait for it to settle.

Four years in tech, but I was working with clients online before that. At seventeen I started editing videos on Fiverr for US clients. The next few years: 500+ deliveries, several thousand dollars billed, and a small team of editors I ran to scale the operation. I learned to handle clients in English — deadlines, feedback, expectations — before I learned any framework. When I started my Associate's in 2022, dev and video ran in parallel for a while. Eventually code took over.

Three seasons in Colorado on a J-1 visa along the way, and a trip to San Francisco that stuck. The accent color on this site owes something to the Golden Gate.

Experience

  1. Freelance Full-stack Developer — Self-employed

    Apr 2026 – Present

    • Building web sites and applications with Next.js, TypeScript, Supabase and Cloudflare. Modern stack, fast to iterate.
    • Designing custom solutions that mix code with automations and integrations, avoiding unnecessary complexity.
    • Bringing product judgment beyond the technical side: SEO, online presence, and what looks good — after four years editing for brands.

  2. Frontend Engineer Intern — Grid Dynamics

    Jul 2025 – Sep 2025

    • Three-month internship at a multinational headquartered in San Francisco, reporting to a senior mentor.
    • Worked through the frontend curriculum: deep JavaScript, modern CSS, API architecture, and security fundamentals.
    • Learned how a software company operates at scale: async reporting and working under mentorship from senior devs.

  3. Freelance Video Editor — Self-employed

    Jun 2021 – Dec 2024

    • Edited 500+ videos for US clients: long-form YouTube, reels, podcasts, and ads — backed by 130+ five-star reviews.
    • Ran a small team of editors and managed client material, keeping every delivery to the standard I offered.
    • Worked with creators and agencies, some with large audiences. Learned that editing supports the idea: it doesn't invent it.

Education

Projects